function Arr() {
			
	this.get_max = function (arr) {

		var max = arr[0];

		for(var i in arr){
			if(arr[i]>max){
				max = arr[i];
			}
		}
		return max;
	}
	this.change_ou = function (arr) {
		
		for (var i in arr) {
			if(arr[i]%2==1){
				arr[i] = arr[i]*2;
			}
		}

		return arr;
	}
	this.change_sort = function (arr) {
		
		temp = [];
		for (var i=arr.length-1,k=0;i>=0;i--,k++) {
			temp[k] = arr[i];
		}
		return temp;
	}
	this.arr_sort = function (arr) {
		
		for(var i in arr){
			for (var i = 0; i < arr.length; i++) {
			
				if(arr[i]>arr[i+1]){
					temp = arr[i];
					arr[i] = arr[i+1]
					arr[i+1] =temp;
				}
			}

		}
		return arr;
	}
}
